If Wi-Fi is ever going to challenge Ethernet, it will need to improve its performance, both in terms of speed and range. The good news is that the IEEE's member vendors are working on ways to do this, developing 802.11n, a fourth Physical layer for Wi-Fi aimed at increasing its maximum real TCP/IP throughput to 100Mbits/sec or more. The bad news is that products based on 802.11n are still about three years away. Draft proposals are due to be published this month, with the serious horse-trading beginning in September.